首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1479305篇
  免费   103489篇
  国内免费   2130篇
耳鼻咽喉   19966篇
儿科学   51831篇
妇产科学   38407篇
基础医学   202177篇
口腔科学   35564篇
临床医学   126729篇
内科学   295230篇
皮肤病学   29239篇
神经病学   119453篇
特种医学   61124篇
外国民族医学   660篇
外科学   229771篇
综合类   29684篇
现状与发展   1篇
一般理论   457篇
预防医学   115718篇
眼科学   31575篇
药学   105759篇
  2篇
中国医学   3078篇
肿瘤学   88499篇
  2019年   10254篇
  2018年   35112篇
  2017年   27132篇
  2016年   30258篇
  2015年   14311篇
  2014年   19384篇
  2013年   28758篇
  2012年   45564篇
  2011年   60858篇
  2010年   42124篇
  2009年   34180篇
  2008年   57439篇
  2007年   62035篇
  2006年   42376篇
  2005年   42742篇
  2004年   42967篇
  2003年   42400篇
  2002年   39856篇
  2001年   64519篇
  2000年   67126篇
  1999年   56841篇
  1998年   15658篇
  1997年   14244篇
  1996年   14491篇
  1995年   13775篇
  1994年   13024篇
  1993年   12000篇
  1992年   44755篇
  1991年   43706篇
  1990年   42474篇
  1989年   40304篇
  1988年   37046篇
  1987年   36367篇
  1986年   33735篇
  1985年   32409篇
  1984年   24264篇
  1983年   20393篇
  1982年   11873篇
  1981年   10778篇
  1979年   21413篇
  1978年   14892篇
  1977年   12591篇
  1976年   11745篇
  1975年   12658篇
  1974年   14716篇
  1973年   14158篇
  1972年   12992篇
  1971年   11766篇
  1970年   11102篇
  1969年   10065篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Molnár  B.  Aroca  S.  Dobos  A.  Orbán  K.  Szabó  J.  Windisch  P.  Stähli  A.  Sculean  A. 《Clinical oral investigations》2022,26(12):7135-7142
Clinical Oral Investigations - To evaluate t he long-term outcomes following treatment of RT 1 multiple adjacent gingival recessions (MAGR) using the modified coronally advanced tunnel (MCAT) with...  相似文献   
2.
PurposeUnderstanding the value of genetic screening and testing for monogenic disorders requires high-quality, methodologically robust economic evaluations. This systematic review sought to assess the methodological quality among such studies and examined opportunities for improvement.MethodsWe searched PubMed, Cochrane, Embase, and Web of Science for economic evaluations of genetic screening/testing (2013-2019). Methodological rigor and adherence to best practices were systematically assessed using the British Medical Journal checklist.ResultsAcross the 47 identified studies, there were substantial variations in modeling approaches, reporting detail, and sophistication. Models ranged from simple decision trees to individual-level microsimulations that compared between 2 and >20 alternative interventions. Many studies failed to report sufficient detail to enable replication or did not justify modeling assumptions, especially for costing methods and utility values. Meta-analyses, systematic reviews, or calibration were rarely used to derive parameter estimates. Nearly all studies conducted some sensitivity analysis, and more sophisticated studies implemented probabilistic sensitivity/uncertainty analysis, threshold analysis, and value of information analysis.ConclusionWe describe a heterogeneous body of work and present recommendations and exemplar studies across the methodological domains of (1) perspective, scope, and parameter selection; (2) use of uncertainty/sensitivity analyses; and (3) reporting transparency for improvement in the economic evaluation of genetic screening/testing.  相似文献   
3.
4.
5.
6.
Isolated patellofemoral arthritis is an increasingly recognized entity, and is usually associated with previous patellofemoral dysplasia or instability. Patellofemoral arthroplasty (PFA) has evolved significantly in recent years, both in terms of implant design and importantly in the understanding of appropriate patient selection. This review outlines the indications and investigations for PFA, provides a brief history of the development of contemporary implants, and presents the clinical outcomes for the prostheses most commonly used in the UK. In addition, it provides a detailed surgical technique for implantation of an onlay implant, with tips on how to optimize patellofemoral biomechanics and thus achieve a consistently good outcome.  相似文献   
7.
8.
9.
BackgroundTotal hip and knee arthroplasties are increasingly performed operations, and routine follow-up places huge demands on orthopedic services. This study investigates the effectiveness, patients’ satisfaction, and cost reduction of Virtual Joint Replacement Clinic (VJRC) follow-up of total hip arthroplasty and total knee arthroplasty patients in a university hospital. VJRC is especially valuable when in-person appointments are not advised or feasible such as during the COVID-19 pandemic.MethodsA total of 1749 patients who were invited for VJRC follow-up for knee or hip arthroplasty from January 2017 to December 2018 were included in this retrospective study. Patients were referred to VJRC after their 6-week postoperative review. Routine VJRC postoperative review was undertaken at 1 and 7 years and then 3-yearly thereafter. We evaluated the VJRC patient response rate, acceptability, and outcome. Patient satisfaction was measured in a subgroup of patients using a satisfaction survey. VJRC costs were calculated compared to face-to-face follow-up.ResultsThe VJRC had a 92.05% overall response rate. Only 7.22% required further in-person appointments with only 3% being reviewed by an orthopedic consultant. VJRC resulted in an estimated saving of £42,644 per year at our institution. The patients’ satisfaction survey showed that 89.29% of the patients were either satisfied or very satisfied with VJRC follow-up.ConclusionVJRC follow-up for hip and knee arthroplasty patients is an effective alternative to in-person clinic assessment which is accepted by patients, has high patient satisfaction, and can reduce the cost to both health services and patients.  相似文献   
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号